TY  - BOOK
AU  - FORBES,GRAEME
TI  - MODERN LOGIC: A TEXT IN ELEMENTARY SYMBOLIC LOGIC / 
U1  - 160 
PY  - 1994///
CY  - [S.N] : 
PB  - OXFORD UNIVERSITY PRESS ، 
KW  - LOGIC
KW  - LOGIC SYMBOLIC AND MATHEMATICAL
KW  - LOGIC, MODERN - 20 CENTURY
ER  -